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Proof step 30 from proof nextl-lemma-butlast (previous step)

lfgen(0)(0) = a ', lfgen(n1)(m0) = lfgen(n0)(m0), lfgen(n1)(0) = a ', lfgen(n1)(m0 + 1) = nextl(m0, lfgen(n0)(m0).last), m0 < n1, n1 ≤ n0, m0 < n0, lfgen(n0)(0) = a ' ∧ (∀ m. m < n0 → lfgen(n0)(m + 1) = nextl(m, lfgen(n0)(m).last)) ⊦ lfgen(n1)(m0 + 1) = lfgen(n0)(m0 + 1), n1 = 0, n0 = 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 31:
lfgen(0)(0) = a ', lfgen(n1)(m0) = lfgen(n0)(m0), lfgen(n1)(0) = a ', lfgen(n1)(m0 + 1) = nextl(m0, lfgen(n0)(m0).last), lfgen(n0)(0) = a ', m0 < n1, n1 ≤ n0, m0 < n0, ∀ m. m < n0 → lfgen(n0)(m + 1) = nextl(m, lfgen(n0)(m).last) ⊦ lfgen(n1)(m0 + 1) = lfgen(n0)(m0 + 1), n1 = 0, n0 = 0

Proof step 30 from proof nextl-lemma-butlast (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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